Plasterer&#39;s float



Sept; 29, 1931. A. R. MORFORD PLAsTEREms FLOAT Filed Dec. 16. 1929 A tfomcy Patented Sept. 29, 1931 UNITED STATES ARTHUR B. MORFORQOF KOKOMO, INDIANA PLASTER-ERFS no.

Application filed December 1 6,,Ser-1a1'N-o. 414,446.

of rubber.

It is a matter of common knowledge, 110wever, that it isdiflicultto securely fasten the rubber to the backing member since the backing member is usually of metal (preferably aluminum) and it frequently happens that the rubber head will break loose from the backing member within the course of a few hours time and will seldom last over a day or two.

The novelty of this invention is predicated upon two features; namely, a method and means for fastening the rubber head to the metallic backing member, and the provision of a detachable handle with practicable means for separably connecting the end portions of the handle with the end portions of the backing member.

In the drawings: Figure 1 is a topplan view of the improved tool.

Figure 2 the same.

Figure 3 is an enlarged fragmentary sectional view showing certain of the details. As seen in Figures 1 and 2, the reference character 4 designates the metallic backing plate. This is in the nature of a substantially rectangular aluminum plate of appropriate thickness and it will be observed that the opposite ends thereof are bent laterally upward as at 5 and the extremities, are

is an edge or side elevation of turned down as at 6 to provide retaining flanges. This provides an intervening web as at 7.

The features 5, 6, 7 form hook-like, keepers at the opposite ends of the backing plate.

These keepers are adapted for reception of In many instances for special" work, the head is in the nature of a block the'foot liike *extensions 8 on the opposite "end' portions of: the handle '9. These exten- "sions are -wi'dened out'to frenderthem of a length commensurate with the hook-like keepers at the opposite-ends of t b g plate. In l the top surfaces 5 thereof I provide groovespan'd" the'grooves removably re- 'eeivethe dowriturnedflanges-YG. Thus, the

fianges- 6 are in the'nature of retaining keys andthe-grooves inlthe nature'of-keyways 6U slidably receiving the keys.

At alternate ends the keywaysare widened out somewhat to form pockets for reception *0)? the} removable retaining wedges 10. The

wedges are'of theendelevation configura-"f tion shown in Figure 2. When the wedges are driven into place, they bind the flanges 6 firmly in place, thus providing an unusual detachable connection between the handle and the backing plate.

This arrangement equalizes stress and strain, and at the same time affords a dependable detachable joint. The reversed arrangement of the wedgesat opposite ends of the foot-like extensions as shown in Figurej 1 is a feature to be emphasized since it insures uniform and equalized retaining means.

In accordance with the present invention, the backing plate is provided with a reten g tion screen as at 11 in Figure 3. This is secured by solder or the like 12 to the plate and is imbedded in the adjacent surface of the rubber block-like head or surfacing member 13. It has been found sufficient, how-g; ever, to simply solder the screen member to the backing plate and to then glue the screen member to the rubber block-like element 13.

This provides a dependable joint between the elements. to The gist of the invention, it is to be 'understood', is in the arrangement of having the reversedly arranged wedge-shaped keys removably receivable in the correspondingly shaped keeper grooves on the foot-like ex-gs tensions 8 of the handle, together with the rubber block-like surface member or head 13, andthe soldered screening for holding it in place.

Persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the construction, features and advantages, after considering the description in connection with the drawings.

Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size and rear- I rangement of details coming within the field of invention claimed may actual practice if desired. I claim:

Ina structure of the class describedpin combination, a brush-head includinga backing plate, having its opposite ends bentupwardly and its terminal portions bent down- Wardly to provide retaining flanges and intervening connecting webs, a handle including feet at its opposite ends resting firmly against said backing plate and havingenlarged handle extensions provided with I grooves constituting keyways and receiving said flanges, alternate end portions of the respective grooves being widened to provide Wedge-receiving recesses and retaining Wedges fitted removablyin said recesses and engaging a portion of the companion flange to securely and detachablyfasten the handle v tothe backing plate.

In testimony whereof I aflix signature.

ARTHUR R. MORFORD.

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